Move chromeos code to namespace chromeos.

chrome/browser/chromeos/settings_contents_view.h

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_CHROMEOS_SETTINGS_CONTENTS_VIEW_H_
 #define CHROME_BROWSER_CHROMEOS_SETTINGS_CONTENTS_VIEW_H_
 
 #include "chrome/browser/views/options/options_page_view.h"
 
+namespace chromeos {
+
 // Contents of the settings page for Chrome OS
 class SettingsContentsView : public OptionsPageView {
  public:
   explicit SettingsContentsView(Profile* profile) : OptionsPageView(profile) {}
   virtual ~SettingsContentsView() {}
 
  protected:
   // OptionsPageView implementation:
   virtual void InitControlLayout();
 
   DISALLOW_COPY_AND_ASSIGN(SettingsContentsView);
 };
 
+}  // namespace chromeos
+
 #endif  // CHROME_BROWSER_CHROMEOS_SETTINGS_CONTENTS_VIEW_H_